cocos2dx 3.x(讓精靈隨着重力感應的方向移動而移動)

//
//  GameScene.hpp
//  HelloWord
//
//  Created by apple on 2017/1/7.
//
//

#ifndef GameScene_hpp
#define GameScene_hpp

#include <stdio.h>
#include "cocos2d.h"

USING_NS_CC;

class GameScene : public cocos2d::Layer
{
public:
    static cocos2d::Scene* createScene();
    
    virtual bool init();
    
    //重力感應回調函數
    void didAccelerate(Acceleration* acc, Event* event);
    
    CREATE_FUNC(GameScene);
    
private:       
    Size size;
    Sprite *sprite;
};
#endif /* GameScene_hpp */

 

 

//
//  GameScene.cpp
//  HelloWord
//
//  Created by apple on 2017/1/7.
//
//

#include "GameScene.hpp"
USING_NS_CC;

cocos2d::Scene* GameScene::createScene()
{
    auto scene = Scene::create();   //創建一個場景
    auto layer = GameScene::create();   //創建一個圖層
    scene->addChild(layer);
    return scene;
}

//初始化當前的圖層
bool GameScene::init()
{
    if(!Layer::init())      //初始化父類
        return false;
    
    //獲取屏幕大小
    size = Director::getInstance()->getVisibleSize();
    //auto size = Director::getInstance()->getWinSize();
    //添加一個圖片精靈
    sprite = Sprite::create("CloseNormal.png");
    sprite->setPosition(Vec2(size.width/2, size.height/2));
    sprite->setTag(12);
    this->addChild(sprite);
    
    //開啟重力感應
    Device::setAccelerometerEnabled(true);
    
    //創建事件監聽對象
    auto listener = EventListenerAcceleration::create(CC_CALLBACK_2(GameScene::didAccelerate, this));
    
    //在事件監聽器中注冊
    _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);
    
    return true;
}

void GameScene::didAccelerate(Acceleration* acc, Event* event)
{
    //使精靈隨重力感應移動
    auto sprite = this->getChildByTag(12);      //通過標簽獲取精靈
    
    auto pos = sprite->getPosition();
    
    pos.x += acc->x;
    pos.y += acc->y;
    //pos.y += acc->y * 10;     //調整精靈移動敏感度
    
    sprite->setPosition(pos);
}